Composition to be used in connection with antiknock compounds



Patented Apr. 17, 1928.

UNITED STATES WILHELM GAUB,

OF LUDmGSHAFEN-ON-THE-BHINE, GERMANY, ASSIGNOB TO I. G.

FABBENINDUBTBIE AKTIENGESELLSCHAFT, OF IRANKFORT-ON-THE-MAIN, GER- MANY.

COMPOSITION. TO BE USED IN CONNECTION WITH ANTIKNOCK COMPOUNDS.

No Drawing.

This inventionrelates to a substance or compound which may be used inconnection with a so-called anti-knock compound for internal combustionengine fuels, for the purpose of rendering the anti-knock compound moresuitable for use.

'In the United States applications Serial Nos. 726,162 filed July 15,1924 and 745,026 filed October 21, 1924, are described soluble metalcompounds that may be added to motor fuels, such as benzene, alcohol,gasoline, 1 etc., for the purpose of preventing knock even when suchfuels are used in high compression internal combustion engines.

These anti-knock compounds are iron compounds, such as iron carbonyl oriron acetyl acetonate, or they may be metal compounds of carbonyl otherthan iron, such as nickel. cobalt molybdenum, etc. It has been foundthat while such soluble metal compounds are suitable to prevent knock,under certain conditions of operation it sometimes occurs that troublesare encountered or other objectionable results occur, apparently due tothe fact that the anti-knock compounds of the metals used becomedecomposed or form compounds or substances ofsuch a character that theyinterfere with the proper operation of the spark plugs. eithershort-circuiting the same or interfering with their normal operation.Also in some cases there appears to be a tendency for the metalcompounds to deposit upon the parts of the motor, such as the valves,cylinder head or walls of the cylinder.

By the resent invention. the difliculties and objections which sometimesarise from .the use of anti-knock compounds containing metals may beavoided by adding a sub- 40 st-sfiice which either causes the metalcompounds to be decomposed so that they will be easily removed from thecombustion chamber or will become innocuous. The resulting constituentsmay become readily removable from the combustion chambereither by beingconverted into the form of a gas or they may be in the liquid form, oreven in the form of finely divided solid substances of a somewhatnon-adherent character. In carrying out this invention, the

substance to be added to the anti-knock compound may be mixed with theanti-knock compound and the mixture introduced into 1 Application filedApril 17, 1925. Serial No. 28,960.

the liquid motor fuel, or the substance to overcome the difliculties ofthe anti-knock compound may be added directly to the fuel either beforeor after the anti-knock comforms. Other compounds suitable for thispurpose are compounds of ammonia with halogens, such as ammoniumchloride, ammonium bromide, etc., and the organic derivatives thereof,such as the aryl and alkyl substitution products. Among the latter maybe mentioned methyl ammonium chloride, ethyl ammonium chloride, methylammonium bromide, ethyl ammonium bromide and di-methyl ammonium, as wellas other diand triderivatives thereof. These substances to be added toavoid troubles due to the use of the anti-knock compound may be usedsingly or in combination of two or more of the same. The amount ofantiknock compound that is to be added to the motor fuel to preventknock varies from about two-tenths of one per cent, more or less, to afew per cent of the amount of the motor fuels. The amount of thesubstance to beadded to overcome the difliculties due to the, use of theanti-knock compound varies over qpite wide ranges, but a substantiallyequiva ent amount of this substance and the anti-knock compound may beused. For example, 100 parts of gasoline are mixed with 0.25 parts ofiron carbonyl, 0.25 parts of ethylene chlorid and 0.37 parts of ethylenebromid or with 0.25 parts of iron carbonyl and 1.25 parts of carbontetrachloride, or with 0.25 parts of iron carbonyl and 2.4 grams perlitre of hexa-chlor-benzene (all parts being by volume).

I claim:

1. A composition comprising a liquid fuel, that has a metal carbonylcompound mixed therewith, and a compound soluble in the said fuel andcontaining a halogen.

2. A composition comprising a liquid fuel, that has a metal carbonylmixed therewith, and a compound solublc in the said fucl and containinga halogen and a hydro carbon radical.

3. A composition comprisimg a liquid 5 Fuel, that has a metal carbonylcompound mixed thcrmvith, and a haloid of an aliphatic hydrocarbon.

4. The composition comprising a liquid fuel, that hasa njrctal carbonylcompound mixed thcrcwith, aml an aliphatic hydrocarbon (lcrivativc ol"ammonium chloride.,

5. A composition comprising a liquiil fucl that has a metal carbonylllllXCll therewith and methyl chloride.

in testimony whereof I have hereunto set my hand.

\VILHELM GAUS.

